Centre for Epidemiological Research, Faculty of Medicine, University of Ostrava, 703 00 Ostrava, Czech Republic.
Department of Epidemiology and Public Health, Faculty of Medicine, University of Ostrava, 703 00 Ostrava, Czech Republic.
Int J Environ Res Public Health. 2021 Aug 25;18(17):8915. doi: 10.3390/ijerph18178915.
The health impacts of suspended particulate matter (SPM) are significantly associated with size-the smaller the aerosol particles, the stronger the biological effect. Quantitative evaluation of fine and ultrafine particles (FP and UFP) is, therefore, an integral part of ongoing epidemiological studies. The mass concentrations of SPM fractions (especially PM, PM, PM) were measured in an industrial area using cascade personal samplers and a gravimetric method, and their mass ratio was determined. The results of PM, PM were also compared with the reference measurement at stationary stations. The mean ratios PM/SPM, PM/SPM, and PM/PM were 0.76, 0.65, and 0.86, respectively. Surprisingly, a mass dominance of UFP with an aerodynamic diameter <0.25 μm (PM) was found with mean ratios of 0.43, 0.57, 0.67 in SPM, PM and PM. The method used showed satisfactory agreement in comparison with reference measurements. The respirable fraction may consist predominantly of UFP. Despite the measures currently being taken to improve air quality, the most biologically efficient UFP can escape and remain in the air. UFP are currently determined primarily as particle number as opposed to the mass concentration used for conventional fractions. This complicates their mutual comparison and determination of individual fraction ratios.
悬浮颗粒物（SPM）对健康的影响与粒径大小显著相关——气溶胶颗粒越小，生物效应越强。因此，对细颗粒物和超细颗粒物（FP 和 UFP）进行定量评估是正在进行的流行病学研究的一个组成部分。采用级联个人采样器和重量法测量了工业区 SPM 各部分（尤其是 PM、PM 和 PM）的质量浓度，并确定了它们的质量比。还将 PM 和 PM 的结果与固定站的参考测量值进行了比较。PM/SPM、PM/SPM 和 PM/PM 的平均比值分别为 0.76、0.65 和 0.86。令人惊讶的是，发现直径<0.25μm 的 UFP（PM）在 SPM、PM 和 PM 中具有质量优势，其平均比值分别为 0.43、0.57 和 0.67。与参考测量值相比，所使用的方法显示出令人满意的一致性。可吸入部分可能主要由 UFP 组成。尽管目前正在采取措施改善空气质量，但最具生物效率的 UFP 可以逃逸并留在空气中。目前，UFP 主要以颗粒数而非传统部分使用的质量浓度来确定。这使得它们之间的相互比较以及确定各个部分的比值变得复杂。
